Submission #974864

#	Time	Username	Problem	Language	Result	Execution time	Memory
974864		aaaaaarroz	Secret (JOI14_secret)	C++17	30 / 100	406 ms	6484 KiB

secret

#include <bits/stdc++.h>
using namespace std;
int Secret(int l, int r);
map<pair<int,int>,int>dp;
map<pair<int,int>,bool>calculed;
template<class T, T m_(T, T)> struct SegmentTree{
    int n; vector<T> ST;
    SegmentTree(){}
    SegmentTree(vector<T> &a){
    n = a.size(); ST.resize(n << 1);
    for (int i=n;i<(n<<1);i++)ST[i]=a[i-n];
    for (int i=n-1;i>0;i--)ST[i]=m_(ST[i<<1],ST[i<<1|1]);
    }
    void update(int pos, T val){ // replace with val
    ST[pos += n] = val;
    for (pos >>= 1; pos > 0; pos >>= 1)
        ST[pos] = m_(ST[pos<<1], ST[pos<<1|1]);
    }
    T query(int l, int r){ // [l, r]
    T ansL, ansR; bool hasL = 0, hasR = 0;
    for (l += n, r += n + 1; l < r; l >>= 1, r >>= 1) {
        if (l & 1) 
        ansL=(hasL?m_(ansL,ST[l++]):ST[l++]),hasL=1;
        if (r & 1) 
        ansR=(hasR?m_(ST[--r],ansR):ST[--r]),hasR=1;
    }
    if (!hasL) return ansR; if (!hasR) return ansL;
    return m_(ansL, ansR);
    }
}; // Give vector of leaves and merge function
    
int merge(int a,int b){
    if(calculed[{a,b}]){
        return dp[{a,b}];
    }
    dp[{a,b}]=Secret(a,b);
    calculed[{a,b}]=true;
    return dp[{a,b}];
}
vector<int>AA;
SegmentTree<int,merge>st(AA);
void Init(int n, int a[]){
    vector<int>arr(n);
    for(int i=0;i<n;i++){
        arr[i]=a[i];
    }
    SegmentTree<int,merge>stt(arr);
    st=stt;
}
int Query(int l,int r){ 
    return st.query(l,r);
}

Compilation message (stderr)

secret.cpp: In member function 'T SegmentTree<T, m_>::query(int, int)':
secret.cpp:27:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   27 |     if (!hasL) return ansR; if (!hasR) return ansL;
      |     ^~
secret.cpp:27:29: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   27 |     if (!hasL) return ansR; if (!hasR) return ansL;
      |                             ^~
secret.cpp: In function 'int Query(int, int)':
secret.cpp:51:24: warning: 'ansR' may be used uninitialized in this function [-Wmaybe-uninitialized]
   51 |     return st.query(l,r);
      |                        ^

• Subtask 1: 30 / 100